1 /* Prototypes of target machine for GNU compiler. MIPS version. 2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 3 1999, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009 4 Free Software Foundation, Inc. 5 Contributed by A. Lichnewsky (lich@inria.inria.fr). 6 Changed by Michael Meissner (meissner@osf.org). 7 64-bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and 8 Brendan Eich (brendan@microunity.com). 9 10 This file is part of GCC. 11 12 GCC is free software; you can redistribute it and/or modify 13 it under the terms of the GNU General Public License as published by 14 the Free Software Foundation; either version 3, or (at your option) 15 any later version. 16 17 GCC is distributed in the hope that it will be useful, 18 but WITHOUT ANY WARRANTY; without even the implied warranty of 19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 GNU General Public License for more details. 21 22 You should have received a copy of the GNU General Public License 23 along with GCC; see the file COPYING3. If not see 24 <http://www.gnu.org/licenses/>. */ 25 26 #ifndef GCC_MIPS_PROTOS_H 27 #define GCC_MIPS_PROTOS_H 28 29 /* Describes how a symbol is used. 30 31 SYMBOL_CONTEXT_CALL 32 The symbol is used as the target of a call instruction. 33 34 SYMBOL_CONTEXT_LEA 35 The symbol is used in a load-address operation. 36 37 SYMBOL_CONTEXT_MEM 38 The symbol is used as the address in a MEM. */ 39 enum mips_symbol_context { 40 SYMBOL_CONTEXT_CALL, 41 SYMBOL_CONTEXT_LEA, 42 SYMBOL_CONTEXT_MEM 43 }; 44 45 /* Classifies a SYMBOL_REF, LABEL_REF or UNSPEC address. 46 47 SYMBOL_ABSOLUTE 48 The symbol's value will be calculated using absolute relocations, 49 such as %hi and %lo. 50 51 SYMBOL_GP_RELATIVE 52 The symbol's value will be calculated by adding a 16-bit offset 53 from $gp. 54 55 SYMBOL_PC_RELATIVE 56 The symbol's value will be calculated using a MIPS16 PC-relative 57 calculation. 58 59 SYMBOL_FORCE_TO_MEM 60 The symbol's value must be forced to memory and loaded from there. 61 62 SYMBOL_GOT_PAGE_OFST 63 The symbol's value will be calculated by loading an address 64 from the GOT and then applying a 16-bit offset. 65 66 SYMBOL_GOT_DISP 67 The symbol's value will be loaded directly from the GOT. 68 69 SYMBOL_GOTOFF_PAGE 70 An UNSPEC wrapper around a SYMBOL_GOT_PAGE_OFST. It represents the 71 offset from _gp of the GOT entry. 72 73 SYMBOL_GOTOFF_DISP 74 An UNSPEC wrapper around a SYMBOL_GOT_DISP. It represents the 75 the offset from _gp of the symbol's GOT entry. 76 77 SYMBOL_GOTOFF_CALL 78 Like SYMBOL_GOTOFF_DISP, but used when calling a global function. 79 The GOT entry is allowed to point to a stub rather than to the 80 function itself. 81 82 SYMBOL_GOTOFF_LOADGP 83 An UNSPEC wrapper around a function's address. It represents the 84 offset of _gp from the start of the function. 85 86 SYMBOL_TLS 87 A thread-local symbol. 88 89 SYMBOL_TLSGD 90 SYMBOL_TLSLDM 91 SYMBOL_DTPREL 92 SYMBOL_GOTTPREL 93 SYMBOL_TPREL 94 UNSPEC wrappers around SYMBOL_TLS, corresponding to the 95 thread-local storage relocation operators. 96 97 SYMBOL_32_HIGH 98 For a 32-bit symbolic address X, this is the value of %hi(X). 99 100 SYMBOL_64_HIGH 101 For a 64-bit symbolic address X, this is the value of 102 (%highest(X) << 16) + %higher(X). 103 104 SYMBOL_64_MID 105 For a 64-bit symbolic address X, this is the value of 106 (%higher(X) << 16) + %hi(X). 107 108 SYMBOL_64_LOW 109 For a 64-bit symbolic address X, this is the value of 110 (%hi(X) << 16) + %lo(X). 111 112 SYMBOL_HALF 113 An UNSPEC wrapper around any kind of address. It represents the 114 low 16 bits of that address. */ 115 enum mips_symbol_type { 116 SYMBOL_ABSOLUTE, 117 SYMBOL_GP_RELATIVE, 118 SYMBOL_PC_RELATIVE, 119 SYMBOL_FORCE_TO_MEM, 120 SYMBOL_GOT_PAGE_OFST, 121 SYMBOL_GOT_DISP, 122 SYMBOL_GOTOFF_PAGE, 123 SYMBOL_GOTOFF_DISP, 124 SYMBOL_GOTOFF_CALL, 125 SYMBOL_GOTOFF_LOADGP, 126 SYMBOL_TLS, 127 SYMBOL_TLSGD, 128 SYMBOL_TLSLDM, 129 SYMBOL_DTPREL, 130 SYMBOL_GOTTPREL, 131 SYMBOL_TPREL, 132 SYMBOL_32_HIGH, 133 SYMBOL_64_HIGH, 134 SYMBOL_64_MID, 135 SYMBOL_64_LOW, 136 SYMBOL_HALF 137 }; 138 #define NUM_SYMBOL_TYPES (SYMBOL_HALF + 1) 139 140 /* Identifiers a style of $gp initialization sequence. 141 142 LOADGP_NONE 143 No initialization sequence is needed. 144 145 LOADGP_OLDABI 146 The o32 and o64 PIC sequence (the kind traditionally generated 147 by .cpload). 148 149 LOADGP_NEWABI 150 The n32 and n64 PIC sequence (the kind traditionally generated 151 by .cpsetup). 152 153 LOADGP_ABSOLUTE 154 The GNU absolute sequence, as generated by loadgp_absolute. 155 156 LOADGP_RTP 157 The VxWorks RTP PIC sequence, as generated by loadgp_rtp. */ 158 enum mips_loadgp_style { 159 LOADGP_NONE, 160 LOADGP_OLDABI, 161 LOADGP_NEWABI, 162 LOADGP_ABSOLUTE, 163 LOADGP_RTP 164 }; 165 166 struct mips16e_save_restore_info; 167 168 /* Classifies a type of call. 169 170 MIPS_CALL_NORMAL 171 A normal call or call_value pattern. 172 173 MIPS_CALL_SIBCALL 174 A sibcall or sibcall_value pattern. 175 176 MIPS_CALL_EPILOGUE 177 A call inserted in the epilogue. */ 178 enum mips_call_type { 179 MIPS_CALL_NORMAL, 180 MIPS_CALL_SIBCALL, 181 MIPS_CALL_EPILOGUE 182 }; 183 184 extern bool mips_symbolic_constant_p (rtx, enum mips_symbol_context, 185 enum mips_symbol_type *); 186 extern int mips_regno_mode_ok_for_base_p (int, enum machine_mode, bool); 187 extern bool mips_stack_address_p (rtx, enum machine_mode); 188 extern int mips_address_insns (rtx, enum machine_mode, bool); 189 extern int mips_const_insns (rtx); 190 extern int mips_split_const_insns (rtx); 191 extern int mips_load_store_insns (rtx, rtx); 192 extern int mips_idiv_insns (void); 193 extern rtx mips_emit_move (rtx, rtx); 194 extern rtx mips_pic_base_register (rtx); 195 extern rtx mips_got_load (rtx, rtx, enum mips_symbol_type); 196 extern bool mips_split_symbol (rtx, rtx, enum machine_mode, rtx *); 197 extern rtx mips_unspec_address (rtx, enum mips_symbol_type); 198 extern void mips_move_integer (rtx, rtx, unsigned HOST_WIDE_INT); 199 extern bool mips_legitimize_move (enum machine_mode, rtx, rtx); 200 201 extern int m16_uimm3_b (rtx, enum machine_mode); 202 extern int m16_simm4_1 (rtx, enum machine_mode); 203 extern int m16_nsimm4_1 (rtx, enum machine_mode); 204 extern int m16_simm5_1 (rtx, enum machine_mode); 205 extern int m16_nsimm5_1 (rtx, enum machine_mode); 206 extern int m16_uimm5_4 (rtx, enum machine_mode); 207 extern int m16_nuimm5_4 (rtx, enum machine_mode); 208 extern int m16_simm8_1 (rtx, enum machine_mode); 209 extern int m16_nsimm8_1 (rtx, enum machine_mode); 210 extern int m16_uimm8_1 (rtx, enum machine_mode); 211 extern int m16_nuimm8_1 (rtx, enum machine_mode); 212 extern int m16_uimm8_m1_1 (rtx, enum machine_mode); 213 extern int m16_uimm8_4 (rtx, enum machine_mode); 214 extern int m16_nuimm8_4 (rtx, enum machine_mode); 215 extern int m16_simm8_8 (rtx, enum machine_mode); 216 extern int m16_nsimm8_8 (rtx, enum machine_mode); 217 218 extern rtx mips_subword (rtx, bool); 219 extern bool mips_split_64bit_move_p (rtx, rtx); 220 extern void mips_split_doubleword_move (rtx, rtx); 221 extern const char *mips_output_move (rtx, rtx); 222 extern bool mips_cfun_has_cprestore_slot_p (void); 223 extern bool mips_cprestore_address_p (rtx, bool); 224 extern void mips_save_gp_to_cprestore_slot (rtx, rtx, rtx, rtx); 225 extern void mips_restore_gp_from_cprestore_slot (rtx); 226 #ifdef RTX_CODE 227 extern void mips_expand_scc (rtx *); 228 extern void mips_expand_conditional_branch (rtx *); 229 extern void mips_expand_vcondv2sf (rtx, rtx, rtx, enum rtx_code, rtx, rtx); 230 extern void mips_expand_conditional_move (rtx *); 231 extern void mips_expand_conditional_trap (rtx); 232 #endif 233 extern bool mips_use_pic_fn_addr_reg_p (const_rtx); 234 extern rtx mips_expand_call (enum mips_call_type, rtx, rtx, rtx, rtx, bool); 235 extern void mips_split_call (rtx, rtx); 236 extern bool mips_get_pic_call_symbol (rtx *, int); 237 extern void mips_expand_fcc_reload (rtx, rtx, rtx); 238 extern void mips_set_return_address (rtx, rtx); 239 extern bool mips_expand_block_move (rtx, rtx, rtx); 240 extern void mips_expand_synci_loop (rtx, rtx); 241 242 extern void mips_init_cumulative_args (CUMULATIVE_ARGS *, tree); 243 extern void mips_function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode, 244 tree, int); 245 extern rtx mips_function_arg (const CUMULATIVE_ARGS *, 246 enum machine_mode, tree, int); 247 extern int mips_function_arg_boundary (enum machine_mode, tree); 248 extern bool mips_pad_arg_upward (enum machine_mode, const_tree); 249 extern bool mips_pad_reg_upward (enum machine_mode, tree); 250 251 extern bool mips_expand_ext_as_unaligned_load (rtx, rtx, HOST_WIDE_INT, 252 HOST_WIDE_INT); 253 extern bool mips_expand_ins_as_unaligned_store (rtx, rtx, HOST_WIDE_INT, 254 HOST_WIDE_INT); 255 extern bool mips_mem_fits_mode_p (enum machine_mode mode, rtx x); 256 extern void mips_override_options (void); 257 extern void mips_conditional_register_usage (void); 258 extern void mips_order_regs_for_local_alloc (void); 259 extern HOST_WIDE_INT mips_debugger_offset (rtx, HOST_WIDE_INT); 260 261 extern void mips_push_asm_switch (struct mips_asm_switch *); 262 extern void mips_pop_asm_switch (struct mips_asm_switch *); 263 extern void mips_print_operand (FILE *, rtx, int); 264 extern void mips_print_operand_address (FILE *, rtx); 265 extern void mips_output_external (FILE *, tree, const char *); 266 extern void mips_output_filename (FILE *, const char *); 267 extern void mips_output_ascii (FILE *, const char *, size_t); 268 extern void mips_output_aligned_decl_common (FILE *, tree, const char *, 269 unsigned HOST_WIDE_INT, 270 unsigned int); 271 extern void mips_declare_common_object (FILE *, const char *, 272 const char *, unsigned HOST_WIDE_INT, 273 unsigned int, bool); 274 extern void mips_declare_object (FILE *, const char *, const char *, 275 const char *, ...) ATTRIBUTE_PRINTF_4; 276 extern void mips_declare_object_name (FILE *, const char *, tree); 277 extern void mips_finish_declare_object (FILE *, tree, int, int); 278 279 extern bool mips_small_data_pattern_p (rtx); 280 extern rtx mips_rewrite_small_data (rtx); 281 extern HOST_WIDE_INT mips_initial_elimination_offset (int, int); 282 extern rtx mips_return_addr (int, rtx); 283 extern bool mips_must_initialize_gp_p (void); 284 extern enum mips_loadgp_style mips_current_loadgp_style (void); 285 extern void mips_emit_save_slot_move (rtx, rtx, rtx); 286 extern void mips_expand_prologue (void); 287 extern void mips_expand_before_return (void); 288 extern void mips_expand_epilogue (bool); 289 extern bool mips_can_use_return_insn (void); 290 extern rtx mips_function_value (const_tree, const_tree, enum machine_mode); 291 292 extern bool mips_cannot_change_mode_class (enum machine_mode, 293 enum machine_mode, enum reg_class); 294 extern bool mips_dangerous_for_la25_p (rtx); 295 extern bool mips_modes_tieable_p (enum machine_mode, enum machine_mode); 296 extern enum reg_class mips_preferred_reload_class (rtx, enum reg_class); 297 extern enum reg_class mips_secondary_reload_class (enum reg_class, 298 enum machine_mode, 299 rtx, bool); 300 extern int mips_class_max_nregs (enum reg_class, enum machine_mode); 301 extern int mips_register_move_cost (enum machine_mode, enum reg_class, 302 enum reg_class); 303 304 extern int mips_adjust_insn_length (rtx, int); 305 extern void mips_output_load_label (rtx); 306 extern const char *mips_output_conditional_branch (rtx, rtx *, const char *, 307 const char *); 308 extern const char *mips_output_order_conditional_branch (rtx, rtx *, bool); 309 extern const char *mips_output_sync (void); 310 extern const char *mips_output_sync_loop (rtx, rtx *); 311 extern unsigned int mips_sync_loop_insns (rtx, rtx *); 312 extern const char *mips_output_division (const char *, rtx *); 313 extern unsigned int mips_hard_regno_nregs (int, enum machine_mode); 314 extern bool mips_linked_madd_p (rtx, rtx); 315 extern bool mips_store_data_bypass_p (rtx, rtx); 316 extern rtx mips_prefetch_cookie (rtx, rtx); 317 318 extern void irix_asm_output_align (FILE *, unsigned); 319 extern const char *current_section_name (void); 320 extern unsigned int current_section_flags (void); 321 extern bool mips_use_ins_ext_p (rtx, HOST_WIDE_INT, HOST_WIDE_INT); 322 323 extern const char *mips16e_output_save_restore (rtx, HOST_WIDE_INT); 324 extern bool mips16e_save_restore_pattern_p (rtx, HOST_WIDE_INT, 325 struct mips16e_save_restore_info *); 326 327 extern bool mask_low_and_shift_p (enum machine_mode, rtx, rtx, int); 328 extern int mask_low_and_shift_len (enum machine_mode, rtx, rtx); 329 extern bool and_operands_ok (enum machine_mode, rtx, rtx); 330 331 union mips_gen_fn_ptrs 332 { 333 rtx (*fn_6) (rtx, rtx, rtx, rtx, rtx, rtx); 334 rtx (*fn_5) (rtx, rtx, rtx, rtx, rtx); 335 rtx (*fn_4) (rtx, rtx, rtx, rtx); 336 }; 337 338 extern void mips_expand_atomic_qihi (union mips_gen_fn_ptrs, 339 rtx, rtx, rtx, rtx); 340 341 extern void mips_expand_vector_init (rtx, rtx); 342 343 extern bool mips_eh_uses (unsigned int); 344 extern bool mips_epilogue_uses (unsigned int); 345 extern void mips_final_prescan_insn (rtx, rtx *, int); 346 extern int mips_trampoline_code_size (void); 347 extern void mips_function_profiler (FILE *); 348 349 typedef rtx (*mulsidi3_gen_fn) (rtx, rtx, rtx); 350 #ifdef RTX_CODE 351 extern mulsidi3_gen_fn mips_mulsidi3_gen_fn (enum rtx_code); 352 #endif 353 354 #endif /* ! GCC_MIPS_PROTOS_H */ 355